I found the Old Man's diary in the house near the cooking pot.
There's a recipe which will give you cold resistance. He says it uses raw meat, a spicy pepper and some other ingredient he can't remember.
What is the third ingredient?
OK, so I looked up the answer.
A Hyrule Bass caught in the lake West of the Temple of Time is what you need.
My question now is: How would I have known that on my own? I only found 3 peppers so I wouldn't have been able to experiment much with the ingredients I had. And it's unlikely I would've found that any time soon.
Is there any other hint that points you toward the third ingredient?
Best Answer
When you read his diary, it mentions that the name of the dish is spicy meat and seafood fry. That's the clue that the last ingredient is fish.
Also, you don't have to specifically use raw meat. I was able to make it with raw drumsticks instead, which is a lot easier to get. I think it just has to have something spicy, some kind of meat, and some kind of fish, all of which is pretty obvious from the name of the dish.